Tunneling machine for hard tunnel rock and cutterhead of tunneling machine

Abstract

The invention discloses a tunneling machine for hard tunnel rock and a cutterhead of the tunneling machine. The cutterhead of the tunneling machine comprises a cutterhead (1), hobs (2) arranged on a working surface of the cutterhead (1), high-pressure water nozzles (5) arranged on the working surface of the cutterhead (1), and scrapers (6) arranged on the working surface of the cutterhead (1) andused for removing slag, wherein the scrapers (6) are arranged on the peripheries of the high-pressure water nozzles (5). According to the cutterhead of the tunneling machine, the scrapers used for removing slag are arranged on the working surface of the cutterhead and are located on the peripheries of the high-pressure water nozzles to remove earth and rock slag between the cutterhead and the tunneling face, so that it is guaranteed that water jet sprayed out of the high-pressure water nozzles can directly act on the tunneling face, rock is effectively cut, the rock breakage efficiency of high-pressure water is improved, and accordingly, the tunneling efficiency is improved; and the scrapers can prevent accumulated slag from moving towards the high-pressure water nozzles, so that hydraulicdevices (high-pressure water nozzles) are effectively prevented from being blocked, and the service life of the nozzles is prolonged.

Description

technical field [0001] The invention relates to the technical field of tunneling machine equipment, in particular to a tunnel boring machine for hard rock and a boring machine cutter head thereof. Background technique [0002] In cross-basin and cross-regional water diversion projects, long tunnels (such as the tunnel length of more than 200km in the west route project of South-to-North Water Diversion Project) are often the first choice for water diversion (conveyance) structures. Under the constraints of terrain and geological conditions, In order to increase the speed of tunnel construction and shorten the construction period, the preferred construction method is to use Tunnel Boring Machine (TBM, Tunnel Boring Machine) for construction. According to the statistics of existing engineering data, the average monthly footage of conventional TBM construction is 500m to 800m, and the monthly footage of a few projects may exceed 1000m. Therefore, the construction period of lon...

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Problems solved by technology

[0004] However, during the excavation process, the phenomenon of slag accumulation at the bottom of the TBM cutter head is common, especially when encountering formations with poor rock mass integrity, slag accumulation is more serious

In this case, the water jet formed by the high-pressure water nozzle will first act on the slag, which cannot directly cut the rock, which has a great impact on the rock-breaking effect of the high-pressure water and affects the excavation efficiency; Nozzle) may cause blockage, affecting the service life of high-pressure water nozzles

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